This
error may be due to the fact that the hbdata.hbd file is set to "Read
Only". You can change the status of the file and HomeBase should open.

You can do this by locating the file, right mouse click on [Windows Start]
select [Explore] select [Programmes] on the left-hand side. On the right-hand
side you can select [HomeBase Folder] and locate your folder. Then right click
on the folder and select [Properties] here you can change the status from
"Read Only".

If the problem persists, you will need to recover your data from backup:

NOTE: If there is no backup file, then use the hbdata.hbd file from the yellow
[HomeBase] folder. Right mouse-click on
file > Select [Rename] > Change .hbd to .old > Continue with above
steps.

2. Recover your book data:

Place the backup file back in the HomeBase backup folder. Open HomeBase >
click on [File] > Select [Recover] > Click on [OK] > new window
appears > Click on [Desktop] symbol (to left of window) and click on [Open]
button > Click on [OK] > Confim whether you wish to have HomeBase
generate unique book numbers.

NOTE: If had to rename and move the hbdata.hbd file, right mouse-click on [Windows Start],
Select [System (C)] and then the yellow
folder [Program Files] > Click on yellow folder [HomeBase] > Right mouse-click on
the file [hbdata.hbd] > Select [Delete] > Scroll up to top of yellow
folder list > Click on [Desktop] symbol > Right mouse-click on
[hbdata.old] > Select [Copy] > Right mouse-click on [Windows Start],
Select [System (C)] and then the yellow
folder [Program Files] > Left
mouse-click on yellow folder [HomeBase] >
Right mouse-click > Select [Paste] > Left mouse-click on
[hbdata.old] file > Select [Rename] > Change to hbdata.hbd.